Adding support for loading the default layout from a content provider
The autority of the provider should be set in secure settings:
launcher3.layout.provider
Bug: 127987071
Change-Id: Iccf2960aa6c0a5a8ff9621b13d8963d9daecb993
diff --git a/src/com/android/launcher3/AutoInstallsLayout.java b/src/com/android/launcher3/AutoInstallsLayout.java
index 62bc53a..0d9bd31 100644
--- a/src/com/android/launcher3/AutoInstallsLayout.java
+++ b/src/com/android/launcher3/AutoInstallsLayout.java
@@ -50,6 +50,7 @@
import java.io.IOException;
import java.util.Locale;
+import java.util.function.Supplier;
/**
* Layout parsing code for auto installs layout
@@ -76,12 +77,8 @@
if (customizationApkInfo == null) {
return null;
}
- return get(context, customizationApkInfo.first, customizationApkInfo.second,
- appWidgetHost, callback);
- }
-
- static AutoInstallsLayout get(Context context, String pkg, Resources targetRes,
- AppWidgetHost appWidgetHost, LayoutParserCallback callback) {
+ String pkg = customizationApkInfo.first;
+ Resources targetRes = customizationApkInfo.second;
InvariantDeviceProfile grid = LauncherAppState.getIDP(context);
// Try with grid size and hotseat count
@@ -114,7 +111,7 @@
// Object Tags
private static final String TAG_INCLUDE = "include";
- private static final String TAG_WORKSPACE = "workspace";
+ public static final String TAG_WORKSPACE = "workspace";
private static final String TAG_APP_ICON = "appicon";
private static final String TAG_AUTO_INSTALL = "autoinstall";
private static final String TAG_FOLDER = "folder";
@@ -156,7 +153,7 @@
protected final PackageManager mPackageManager;
protected final Resources mSourceRes;
- protected final int mLayoutId;
+ protected final Supplier<XmlPullParser> mInitialLayoutSupplier;
private final InvariantDeviceProfile mIdp;
private final int mRowCount;
@@ -171,6 +168,12 @@
public AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
LayoutParserCallback callback, Resources res,
int layoutId, String rootTag) {
+ this(context, appWidgetHost, callback, res, () -> res.getXml(layoutId), rootTag);
+ }
+
+ public AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
+ LayoutParserCallback callback, Resources res,
+ Supplier<XmlPullParser> initialLayoutSupplier, String rootTag) {
mContext = context;
mAppWidgetHost = appWidgetHost;
mCallback = callback;
@@ -180,7 +183,7 @@
mRootTag = rootTag;
mSourceRes = res;
- mLayoutId = layoutId;
+ mInitialLayoutSupplier = initialLayoutSupplier;
mIdp = LauncherAppState.getIDP(context);
mRowCount = mIdp.numRows;
@@ -193,9 +196,9 @@
public int loadLayout(SQLiteDatabase db, IntArray screenIds) {
mDb = db;
try {
- return parseLayout(mLayoutId, screenIds);
+ return parseLayout(mInitialLayoutSupplier.get(), screenIds);
} catch (Exception e) {
- Log.e(TAG, "Error parsing layout: " + e);
+ Log.e(TAG, "Error parsing layout: ", e);
return -1;
}
}
@@ -203,9 +206,8 @@
/**
* Parses the layout and returns the number of elements added on the homescreen.
*/
- protected int parseLayout(int layoutId, IntArray screenIds)
+ protected int parseLayout(XmlPullParser parser, IntArray screenIds)
throws XmlPullParserException, IOException {
- XmlPullParser parser = mSourceRes.getXml(layoutId);
beginDocument(parser, mRootTag);
final int depth = parser.getDepth();
int type;
@@ -248,7 +250,7 @@
final int resId = getAttributeResourceValue(parser, ATTR_WORKSPACE, 0);
if (resId != 0) {
// recursively load some more favorites, why not?
- return parseLayout(resId, screenIds);
+ return parseLayout(mSourceRes.getXml(resId), screenIds);
} else {
return 0;
}
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 39d93c8..f830301 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -34,6 +34,7 @@
import android.content.OperationApplicationException;
import android.content.SharedPreferences;
import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.pm.ProviderInfo;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.DatabaseUtils;
@@ -51,8 +52,10 @@
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.BaseColumns;
+import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;
+import android.util.Xml;
import com.android.launcher3.AutoInstallsLayout.LayoutParserCallback;
import com.android.launcher3.LauncherSettings.Favorites;
@@ -63,15 +66,21 @@
import com.android.launcher3.provider.LauncherDbUtils;
import com.android.launcher3.provider.LauncherDbUtils.SQLiteTransaction;
import com.android.launcher3.provider.RestoreDbTask;
+import com.android.launcher3.util.IOUtils;
import com.android.launcher3.util.IntArray;
import com.android.launcher3.util.IntSet;
import com.android.launcher3.util.NoLocaleSQLiteHelper;
import com.android.launcher3.util.Preconditions;
import com.android.launcher3.util.Thunk;
+import org.xmlpull.v1.XmlPullParser;
+
import java.io.File;
import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.InputStream;
import java.io.PrintWriter;
+import java.io.StringReader;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
@@ -93,8 +102,6 @@
static final String EMPTY_DATABASE_CREATED = "EMPTY_DATABASE_CREATED";
- private static final String RESTRICTION_PACKAGE_NAME = "workspace.configuration.package.name";
-
private final ChangeListenerWrapper mListenerWrapper = new ChangeListenerWrapper();
private Handler mListenerHandler;
@@ -505,25 +512,40 @@
*/
private AutoInstallsLayout createWorkspaceLoaderFromAppRestriction(AppWidgetHost widgetHost) {
Context ctx = getContext();
- UserManager um = (UserManager) ctx.getSystemService(Context.USER_SERVICE);
- Bundle bundle = um.getApplicationRestrictions(ctx.getPackageName());
- if (bundle == null) {
+ InvariantDeviceProfile grid = LauncherAppState.getIDP(ctx);
+
+ String authority = Settings.Secure.getString(ctx.getContentResolver(),
+ "launcher3.layout.provider");
+ if (TextUtils.isEmpty(authority)) {
return null;
}
- String packageName = bundle.getString(RESTRICTION_PACKAGE_NAME);
- if (packageName != null) {
- try {
- Resources targetResources = ctx.getPackageManager()
- .getResourcesForApplication(packageName);
- return AutoInstallsLayout.get(ctx, packageName, targetResources,
- widgetHost, mOpenHelper);
- } catch (NameNotFoundException e) {
- Log.e(TAG, "Target package for restricted profile not found", e);
- return null;
- }
+ ProviderInfo pi = ctx.getPackageManager().resolveContentProvider(authority, 0);
+ if (pi == null) {
+ Log.e(TAG, "No provider found for authority " + authority);
+ return null;
}
- return null;
+ Uri uri = new Uri.Builder().scheme("content").authority(authority).path("launcher_layout")
+ .appendQueryParameter("version", "1")
+ .appendQueryParameter("gridWidth", Integer.toString(grid.numColumns))
+ .appendQueryParameter("gridHeight", Integer.toString(grid.numRows))
+ .appendQueryParameter("hotseatSize", Integer.toString(grid.numHotseatIcons))
+ .build();
+
+ try (InputStream in = ctx.getContentResolver().openInputStream(uri)) {
+ // Read the full xml so that we fail early in case of any IO error.
+ String layout = new String(IOUtils.toByteArray(in));
+ XmlPullParser parser = Xml.newPullParser();
+ parser.setInput(new StringReader(layout));
+
+ Log.d(TAG, "Loading layout from " + authority);
+ return new AutoInstallsLayout(ctx, widgetHost, mOpenHelper,
+ ctx.getPackageManager().getResourcesForApplication(pi.applicationInfo),
+ () -> parser, AutoInstallsLayout.TAG_WORKSPACE);
+ } catch (Exception e) {
+ Log.e(TAG, "Error getting layout stream from: " + authority , e);
+ return null;
+ }
}
private DefaultLayoutParser getDefaultLayoutParser(AppWidgetHost widgetHost) {